crypto: hisilicon/qm - add debugfs for QM

Add DebugFS method to get the information of IRQ/Requests/QP .etc of QM
for HPRE/ZIP/SEC drivers.

Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Signed-off-by: Shukun Tan <tanshukun1@huawei.com>
Reviewed-by: Zaibo Xu <xuzaibo@huawei.com>
Reviewed-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/Documentation/ABI/testing/debugfs-hisi-hpre b/Documentation/ABI/testing/debugfs-hisi-hpre
index ec4a79e..1f96665 100644 (file)
--- a/Documentation/ABI/testing/debugfs-hisi-hpre
+++ b/Documentation/ABI/testing/debugfs-hisi-hpre
@@ -55,3 +55,34 @@ Description:    QM debug registers(qm_regs) read clear control. 1 means enable
                Writing to this file has no functional effect, only enable or
                disable counters clear after reading of these registers.
                Only available for PF.
+
+What:           /sys/kernel/debug/hisi_hpre/<bdf>/qm/err_irq
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of invalid interrupts for
+               QM task completion.
+               Available for both PF and VF, and take no other effect on HPRE.
+
+What:           /sys/kernel/debug/hisi_hpre/<bdf>/qm/aeq_irq
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of QM async event queue interrupts.
+               Available for both PF and VF, and take no other effect on HPRE.
+
+What:           /sys/kernel/debug/hisi_hpre/<bdf>/qm/abnormal_irq
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of interrupts for QM abnormal event.
+               Available for both PF and VF, and take no other effect on HPRE.
+
+What:           /sys/kernel/debug/hisi_hpre/<bdf>/qm/create_qp_err
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of queue allocation errors.
+               Available for both PF and VF, and take no other effect on HPRE.
+
+What:           /sys/kernel/debug/hisi_hpre/<bdf>/qm/mb_err
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of failed QM mailbox commands.
+               Available for both PF and VF, and take no other effect on HPRE.

diff --git a/Documentation/ABI/testing/debugfs-hisi-sec b/Documentation/ABI/testing/debugfs-hisi-sec
index 06adb89..c3ba09c 100644 (file)
--- a/Documentation/ABI/testing/debugfs-hisi-sec
+++ b/Documentation/ABI/testing/debugfs-hisi-sec
@@ -41,3 +41,34 @@ Description:    Enabling/disabling of clear action after reading
                the SEC's QM debug registers.
                0: disable, 1: enable.
                Only available for PF, and take no other effect on SEC.
+
+What:           /sys/kernel/debug/hisi_sec2/<bdf>/qm/err_irq
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of invalid interrupts for
+               QM task completion.
+               Available for both PF and VF, and take no other effect on SEC.
+
+What:           /sys/kernel/debug/hisi_sec2/<bdf>/qm/aeq_irq
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of QM async event queue interrupts.
+               Available for both PF and VF, and take no other effect on SEC.
+
+What:           /sys/kernel/debug/hisi_sec2/<bdf>/qm/abnormal_irq
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of interrupts for QM abnormal event.
+               Available for both PF and VF, and take no other effect on SEC.
+
+What:           /sys/kernel/debug/hisi_sec2/<bdf>/qm/create_qp_err
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of queue allocation errors.
+               Available for both PF and VF, and take no other effect on SEC.
+
+What:           /sys/kernel/debug/hisi_sec2/<bdf>/qm/mb_err
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of failed QM mailbox commands.
+               Available for both PF and VF, and take no other effect on SEC.

diff --git a/Documentation/ABI/testing/debugfs-hisi-zip b/Documentation/ABI/testing/debugfs-hisi-zip
index a7c63e6..cc568fd 100644 (file)
--- a/Documentation/ABI/testing/debugfs-hisi-zip
+++ b/Documentation/ABI/testing/debugfs-hisi-zip
@@ -48,3 +48,34 @@ Description:    QM debug registers(qm_regs) read clear control. 1 means enable
                Writing to this file has no functional effect, only enable or
                disable counters clear after reading of these registers.
                Only available for PF.
+
+What:           /sys/kernel/debug/hisi_zip/<bdf>/qm/err_irq
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of invalid interrupts for
+               QM task completion.
+               Available for both PF and VF, and take no other effect on ZIP.
+
+What:           /sys/kernel/debug/hisi_zip/<bdf>/qm/aeq_irq
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of QM async event queue interrupts.
+               Available for both PF and VF, and take no other effect on ZIP.
+
+What:           /sys/kernel/debug/hisi_zip/<bdf>/qm/abnormal_irq
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of interrupts for QM abnormal event.
+               Available for both PF and VF, and take no other effect on ZIP.
+
+What:           /sys/kernel/debug/hisi_zip/<bdf>/qm/create_qp_err
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of queue allocation errors.
+               Available for both PF and VF, and take no other effect on ZIP.
+
+What:           /sys/kernel/debug/hisi_zip/<bdf>/qm/mb_err
+Date:           Apr 2020
+Contact:        linux-crypto@vger.kernel.org
+Description:    Dump the number of failed QM mailbox commands.
+               Available for both PF and VF, and take no other effect on ZIP.

diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 6365f93..744d131 100644 (file)
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -324,6 +324,19 @@ struct hisi_qm_hw_ops {
        enum acc_err_result (*hw_error_handle)(struct hisi_qm *qm);
 };
 
+struct qm_dfx_item {
+       const char *name;
+       u32 offset;
+};
+
+static struct qm_dfx_item qm_dfx_files[] = {
+       {"err_irq", offsetof(struct qm_dfx, err_irq_cnt)},
+       {"aeq_irq", offsetof(struct qm_dfx, aeq_irq_cnt)},
+       {"abnormal_irq", offsetof(struct qm_dfx, abnormal_irq_cnt)},
+       {"create_qp_err", offsetof(struct qm_dfx, create_qp_err_cnt)},
+       {"mb_err", offsetof(struct qm_dfx, mb_err_cnt)},
+};
+
 static const char * const qm_debug_file_name[] = {
        [CURRENT_Q]    = "current_q",
        [CLEAR_ENABLE] = "clear_enable",
@@ -514,6 +527,8 @@ static int qm_mb(struct hisi_qm *qm, u8 cmd, dma_addr_t dma_addr, u16 queue,
 busy_unlock:
        mutex_unlock(&qm->mailbox_lock);
 
+       if (ret)
+               atomic64_inc(&qm->debug.dfx.mb_err_cnt);
        return ret;
 }
 
@@ -671,6 +686,7 @@ static irqreturn_t qm_irq(int irq, void *data)
        if (readl(qm->io_base + QM_VF_EQ_INT_SOURCE))
                return do_qm_irq(irq, data);
 
+       atomic64_inc(&qm->debug.dfx.err_irq_cnt);
        dev_err(&qm->pdev->dev, "invalid int source\n");
        qm_db(qm, 0, QM_DOORBELL_CMD_EQ, qm->status.eq_head, 0);
 
@@ -683,6 +699,7 @@ static irqreturn_t qm_aeq_irq(int irq, void *data)
        struct qm_aeqe *aeqe = qm->aeqe + qm->status.aeq_head;
        u32 type;
 
+       atomic64_inc(&qm->debug.dfx.aeq_irq_cnt);
        if (!readl(qm->io_base + QM_VF_AEQ_INT_SOURCE))
                return IRQ_NONE;
 
@@ -1192,6 +1209,7 @@ static struct hisi_qp *qm_create_qp_nolock(struct hisi_qm *qm, u8 alg_type)
        if (qm->qp_in_used == qm->qp_num) {
                dev_info_ratelimited(dev, "All %u queues of QM are busy!\n",
                                     qm->qp_num);
+               atomic64_inc(&qm->debug.dfx.create_qp_err_cnt);
                return ERR_PTR(-EBUSY);
        }
 
@@ -1199,6 +1217,7 @@ static struct hisi_qp *qm_create_qp_nolock(struct hisi_qm *qm, u8 alg_type)
        if (qp_id < 0) {
                dev_info_ratelimited(dev, "All %u queues of QM are busy!\n",
                                    qm->qp_num);
+               atomic64_inc(&qm->debug.dfx.create_qp_err_cnt);
                return ERR_PTR(-EBUSY);
        }
 
@@ -2249,6 +2268,26 @@ err_unlock:
 }
 EXPORT_SYMBOL_GPL(hisi_qm_stop);
 
+static int qm_debugfs_atomic64_set(void *data, u64 val)
+{
+       if (val)
+               return -EINVAL;
+
+       atomic64_set((atomic64_t *)data, 0);
+
+       return 0;
+}
+
+static int qm_debugfs_atomic64_get(void *data, u64 *val)
+{
+       *val = atomic64_read((atomic64_t *)data);
+
+       return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(qm_atomic64_ops, qm_debugfs_atomic64_get,
+                        qm_debugfs_atomic64_set, "%llu\n");
+
 /**
  * hisi_qm_debug_init() - Initialize qm related debugfs files.
  * @qm: The qm for which we want to add debugfs files.
@@ -2257,7 +2296,9 @@ EXPORT_SYMBOL_GPL(hisi_qm_stop);
  */
 int hisi_qm_debug_init(struct hisi_qm *qm)
 {
+       struct qm_dfx *dfx = &qm->debug.dfx;
        struct dentry *qm_d;
+       void *data;
        int i, ret;
 
        qm_d = debugfs_create_dir("qm", qm->debug.debug_root);
@@ -2273,6 +2314,15 @@ int hisi_qm_debug_init(struct hisi_qm *qm)
 
        debugfs_create_file("qm_regs", 0444, qm->debug.qm_d, qm, &qm_regs_fops);
 
+       for (i = 0; i < ARRAY_SIZE(qm_dfx_files); i++) {
+               data = (atomic64_t *)((uintptr_t)dfx + qm_dfx_files[i].offset);
+               debugfs_create_file(qm_dfx_files[i].name,
+                       0644,
+                       qm_d,
+                       data,
+                       &qm_atomic64_ops);
+       }
+
        return 0;
 
 failed_to_create:
@@ -3311,6 +3361,7 @@ static irqreturn_t qm_abnormal_irq(int irq, void *data)
        struct hisi_qm *qm = data;
        enum acc_err_result ret;
 
+       atomic64_inc(&qm->debug.dfx.abnormal_irq_cnt);
        ret = qm_process_dev_error(qm);
        if (ret == ACC_ERR_NEED_RESET)
                schedule_work(&qm->rst_work);

diff --git a/drivers/crypto/hisilicon/qm.h b/drivers/crypto/hisilicon/qm.h
index a431ff2..e4b46a7 100644 (file)
--- a/drivers/crypto/hisilicon/qm.h
+++ b/drivers/crypto/hisilicon/qm.h
@@ -121,6 +121,14 @@ enum qm_debug_file {
        DEBUG_FILE_NUM,
 };
 
+struct qm_dfx {
+       atomic64_t err_irq_cnt;
+       atomic64_t aeq_irq_cnt;
+       atomic64_t abnormal_irq_cnt;
+       atomic64_t create_qp_err_cnt;
+       atomic64_t mb_err_cnt;
+};
+
 struct debugfs_file {
        enum qm_debug_file index;
        struct mutex lock;
@@ -129,6 +137,7 @@ struct debugfs_file {
 
 struct qm_debug {
        u32 curr_qm_qp_num;
+       struct qm_dfx dfx;
        struct dentry *debug_root;
        struct dentry *qm_d;
        struct debugfs_file files[DEBUG_FILE_NUM];